sedimentary
Jasper
Silicon dioxide (SiO2)
AI-generated identification · may be incorrectMohs hardness of 6.5 to 7. Brown to red-brown color, opaque luster, microcrystalline quartz structure with conchoidal fracture.
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Physical properties
Mohs hardness of 6.5 to 7. Brown to red-brown color, opaque luster, microcrystalline quartz structure with conchoidal fracture.
Formation & geological history
Formed via the precipitation of silica-rich fluids in sedimentary environments or hydrothermal veins over millions of years.
Uses & applications
Used primarily for ornamental carvings, polished cabochons in jewelry, and geological specimen collecting.
Geological facts
Jasper is an opaque variety of chalcedony often containing up to 20% foreign materials, which account for its varied colors and patterns.
Field identification & locations
Identify by its waxy luster, smooth water-worn texture in stream beds, and inability to be scratched by a steel knife. Found globally.
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Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
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